Swinging ore-mill.



J. LAMPERT.

SWINGING ORE MILL.

APPLICATION mio Inmo. |912. nzuzwzn 0m20.191s.

Patented July 25, 1916.

2 SHEETS-SHEET l.

1. LAMPERT.

SWINGING ORE MILL.

APPLICATION mw JAN/0. |912. nzNzwED 0m20.191s.

Patented July 25, 1916.

2 SHEETS-SHEET 2 ab' a6 UNITED sTATEs PATENT oEEicE.

JACOB LAMPERT, OF RAPID CITY, SOUTH DAKOTA.

SWING-ING ORE-MILL.

Specification of Letters Patent.

Patented July 25, 1916.

Application iled January 20, 1912, Serial No. 672,590. Renewed December 20, 1915. Serial No. 67,953.

power and with minimum attention and liability of getting out of order to reduce ore to a required neness; also to reduce the noise as compared with stamp mills.

The invention may be applied in various ways and includes a swinging mortar and means within the mortar to cooperate therewith to grind, crush and pulverize the ore or other frangible material fed to the mortar.

Special features of the invention which essentially contribute toward the attainment of the foregoing objects are the provision of novel adjustable screen means whereby the depth of the pulp may be governed, and the provision of a crushing roller that is heavier on one side than on the other so as to be normally returned to rest by gravity with the heavler side down, thereby obtaining smoothness of operation not attainable with a balanced roller.

The invention also includes various parts and combinations of parts hereinafter particularly pointed out.

The 'accompanying drawings illustrate the invention.

Figure 1 is a sectional elevation viewed from line m1, Figs. 2 and'3, of one form of ore mill constructed in accordance with this invention. Fig. 2 is a broken plan of the mill shown in Fig. 1. Fig. 3 is an elevation of the mill from the left of Figs. 1 and 2. Fig. 4.is an elevation analogous to Fig. 1, showing a -orm'of the invention in which the crushingy element is held practically stationary. Fig. 5 is a plan of the mill shown in Fig. 4; parts being in section on line w, Fig. 4. In Figs. 1, 2, 4 and 5 portions are broken away to contract the view. The mill comprises a swing including a pan or mortar 1 which may be swung by means comprising four suspendin rods 2, a pivotal axis 3 and a support 4. he swing may be variously constructed and in the the bearings 6 by suitable means as by rivets 7 or by welding. The bearings 6 rest upon the .shaft 3 which forms the pivotal axis and is mounted at its ends in journal bearings 8 carried by the frame 4 comprising cross pieces 9, and posts 10 mounted on sills 10'. The pan is provided with terminal screen means 11 extending above the floor 12 of the pan which is provided with side walls 13, there being crushing means in the form of a crusher in the pan to cooperate with the floor 12 as the pan swings so as to crush between the pan 'loor and the crushing means the ore fed to the pan.

The crushing means shown in Figs. 1 and 2 comprises a heavy roller that is loose in the pan andadapted to roll by gravity as the swing swings to and fro. The roller shown comprises a heavy core 14 that is substantially the segment of a cylinder and has a fiat top face 15 on which is fitted a light block 16 of wood or other material. The perimeter of the roller is formed by a hard hollow cylindrical shell 17 of suitable material as forged chrome steel, fixed in place by suitable means as the wedges 18. The roller is so disposed upon being placed in the pan, that the light side formed by the flat face will be uppermost at the middle of the pan when the swing is at rest; so

that in the ordinary operation of the machine the tendency of the roller will be to assist the sWin to return to rest with the roller at the mlddle of the pan. Means to swing the pan comprise a forked connecting rod 19 pivoted at one end by the pins 20 to the pan and pivoted .at the other end by the crank pin 21 to the crank wheel 22 which may be driven by a belt 23 or other suitable means. The screens 11 are held in place by guides 24, and wedges 25. It is clear that the faster the pan 1 is swung, the higher the material in the pan will be thrown, and provision is made for regulating the amount of material that passes through the screen regardless of the number of oscillations per minute of the pan, so that the output of the machine may be made greater or less as desired; and for this purpose the screens may be raised and lowered. Blocks 26 may be provided for insertion below the screens when it is desired to increase the depth of the pulp that will be retained in the pan and to regulate the amount of material that passes through the screens. The ore may be fed to the pan intermittently or otherwise by any suitable means and water will be delivered to the pan if necessary by any suitable means, as a pipe 27.

The crusher shown is provided with a feed-way 28 therethrough from top to bottom to admit the ore to the pan directly below the crusher. When there is a supply of ore inthe feed-way and the pan is swung, the ore will fall by gravity onto the pan,

first on one side and then the other of the line of contact between the crusher and the pan. The Hoor of the pan conforms to an arc concentric with the axisl 3 of oscillation of the pan and the crusher has a relative oscillatpry motion as the swing oscillates, so that at each oscillation, material on the floor will be crushed between the crusher and the floor. It is understood that the ore may be fed by special automatic feeders not shown through a feed pipe 29 having a flexible portion 29 connectlng it to the feed-way 28 and that as the crushing proceeds the pulp reduced to suflicient fineness will flow out or be splashed out through the meshes of the screens. In practical operation the pan will dump a portion of its contents through the screen at the end of each oscillation and the roller, at the moment the dumping occurs is moving toward the end where the dumping occurs, but is instantly returned toward the other end by the action of gravity as the pan is swung in the opposite direction. The pan is preferably provided with a concave floor 12 s0 that in practical operation the concavity will be an arc struck from the axis of the shaft 3 so that the tendency of the roller will be to remain centered with a vertical line drawn from the shaft. In the form shown in Fig. 4, the crushing member 30 is a practically fixed block so that the pan rubs underneath it as the swinging motion occurs. Braces 31 pivotally secured to the block by pins 32 and to the frame by bolt rods 33 1n slots 34 hold the crusher block in its practically fixed position and limit the upward movement thereof; there belng a sllght looseness of parts provided by the slots so as to accomodate rise and fall of the crusher as the ore charge comes between the crusher and the floor. By this constructlon 1t. 1s clear that maximum crushing and grinding effect will be produced, thebraces helplng to hold the crusher blocks down to its work. The crusher block is provided with a feed- Way 35 having a downwardly widening mouth 36 to chamber the ore as it reaches the floor so that as the swing is operated the crusher will rub the ore onto the Hoor and will triturate the ore between the Hoor and the bottom of the crusher block. It is noted that by widening the mouth 36 downward the crushingefi'ect is maximized, for it is evident that the ore will more readily feed between the floor and the crusher block than if the mouth were not so expanded and that the material will receive its initial crushing while in the mouth so that the material finally discharged from along the edges of the crusher block will be minutely divided. The pulp will discharge through the end screens as before described with relation to Fig. 1. The feed-way 28 is located centrally of the crusher so that the ore will be fed to the center of the pan from which point it will spread as the crushing operation proceeds. In the form shown in Figs. 3 to 5 it is clear that during the operation of the device no portion of the grinding face of the block 30 will be swung away from the pan excepting by the wedging action of the material between the block and pan, so that the weight of the block is effective over the entire area of the grinding face to pulverize the material.

1. An ore mill comprising a pan, a crusher in the pan, means to cause relative movement between the crusher and the pan, terminal screens for pan, means to hold the screens at different heights above the floor of the pan, and blocks insertible below the screens when the same are raised to govern the depth of pulp in the pan.

2. An ore mill comprising a pan, means to suspend the pan, a roller in the pan provided with a feed-way therethrough closed by the pan in one position, thereby, and means to swing the pan to cause alternate opening and closing of the feed-way.

3. The ore mill crushing roller set forth consisting of a hollow cylindrical shell and a heavy segmental core in the shell to overbalance one side thereof.

4. The ore mill crushing roller set forth consisting of a hollow cylindrical shell; a heavy segmental core in the shell to overbalance one side thereof; and a light block in the top of the shell above the segmental core.

5. The combination with a swinging pan; of a crushing roller comprising a core in the form of a segment of a cylinder and a cylindrical shell thereon adapted to be overbalanced by said core.

6. In combination, a pan, and a crushing roller in the pan, said roller being heavier on one side than on the other side so as to bel normally returned to rest by gravity with the heavier side down.

7. An' ore mill comprising a pan, a roller in the pan provided with a feed-way therethrough, a feed pipe having a flexible portion connected with the feed-wa and means to cause relative movement between the roller and pan.

' means to swing the pan, and means to ad just the height of the screen above the floor A of the pan so as to regulate the amount of material that passes through the screen.

'In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 15th day of January, 1912.

JACOB LAMPERT.

In presence of- JAMES W. TowNsEND, L. BELLE RICE. 

